Such signs _____ we use in the experiment ______ Greek letters. [ ]

My sister can’t cook, I can’t, ________ .

The play was not interesting, so there were ________ people in the theatre.

Have you heard that more flights from WuXi to Beijing are available this year—Of course. Many citizens are ____ for it’s quite convenient for them to travel.

ctory produces half a million pairs ofshoes every year,80%________ are sold abroad.